Wash-pipe valve



A. THOMSON WASH PIPE VALVE July 29, 1924,.

@M2M/Wm o. and securing these twol sections of pipe to- UJI Patented duly 29, i924.,

NETE@ ALEXANDER THOMSON, DF SOURLAKE, TEXAS.

WASH-PTFE VALVE.

Application filed August 3, 1922, Serial No. 578,432. Renewed February 23, 1924.

To @ZZ whom t may concern:

Be it known that I, ALEXANDER THOMSON, citizen of the United States, residing at Sourlake, in the county of Hardin and State -of Texas, have invented certain new and useful Improvements in Wash-Pipe Valves, of

which the following isy a specification.

This invention relates to new and useful improvements in a wash pipe valve, and is particularly adapted to be used in connection with a wash pipe, in washing the strainer -in a deep well.`

One object of the invention is to provide a device of the character described adapted to be attached to the upper end of a wash pipe for the purpose of ascertaining when the set pipe is released from the screen.

Another object of the invention is to 'provide a-means for shutting on practically all of the water forced down into the set pipe at the .proper time to accurately determine whether` or not the set pipe has been detached from the screen before withdrawing the set pipe from the bore of the well.

With the above and other objects in view this invention has particular relation to certain novel features of construction, operation andl arrangement of parts, an example of which is given in this specification and illustrated in the accompanying drawings wherein Figure 1 is a vertical sectional view showing my invention attached to the upper end of a wash pipe.

Figure 2 is a vertical sectional view of the valve and ring; and,

Figure 3 is a transverse sectional view of the device taken on the line 3 3 of Figure 2, and shown surrounded by the valve seat.

Referring now more particularly t0 the drawings, wherein like numerals'of reference designate similar parts in each of the figures, the numeral 4 represents the well casing which remains permanently in the bore of the well. The numeral 5 designatesv Between two sections of the set pipe 5 there is inserted the inwardly projecting ring 7,

gether and holding this ring 7 in position is the couplingl 8. The screen is connected onto the set pipe by means of the coupling 9.

Within the casing 4 and above the coupling 9 is what is commonly termed a lead seal 10 which is intended to preventany fluid from passing up from around the screen and out tothe surface of the ground, except through the screen 6, and it is usual and customary to leave at least one jointof setv pipe secured to the upper end of.` the screen. This lead seal is usually yset between this blank joint of pipe 11 and the casing 4 as shown at'lO.

Tn the lower end of the screen 6 is the usual spider 12, and secured thereto in the usual and customary manner is the back pressure valve 13 which is threaded into the collar 14 in the usual and well `known manner.

Tmmediately above vthis spider 12 is the plug 15, and resting upon'the upper end of this plug is the wash pipe 16 upon the upper end of which my improved valve 17 is threaded.

This valve is substantially of an inverted cup like form and one end is lprovided .with an annular shoulder 18, and a small port 1.9 is bored through this last mentioned end. Immediately below Vthis shoulder are a plurality of lateral holes 20 and 21.A

The Operation of the device is as follows: The ring 9 is placed between the ends of two joints of pipe and held in position by means of the collar 8 and above the usual lead seal 10. The valve 17 is screwed onto the upper end of the wash pipe 16, which may be of any desired length. The wash pipe is inserted through the ring to the bottom of the screen and rests upon the annular plu 15. The passageway in the wash pipe an the hole, through the plug 15 are in alignment with the back pressure valve 13, hereinabove described. When the set pipe 5 is backed out of connection at some joint, as at 22, and is raised up, the ring 7 will come in contact with the shoulder 18 of valve 17, and will block the openings 20 and 21 of the wash pipe and thus stop practically all of the flow of 'luid through the wash pipe which will cause an excessive pressure on the pump chokingthe pump down to a very slow stroke thus making it known that the set pipe is released from the seal 10 and that thescreen is consequently properly set.

The small opening 19 in the top of the valve 17 is Jfor the purpose of permitting only sufficient fluid being vpumped through same to wash the inside of the screen during the withdrawal of the wash pipe. It is impossible to elevate the ring 7 to contact of fluid through the washpipe, unless the set pipe is completely released from the ipe below, leaving the seal in proper pince. Therefore, it is evident to the driller. where the desired result has been accomplished.

If, after drawing up the set pipe 5 a short distance, the pumps do notl slow down, it is then evident that the set pipe has not been disconnected from the seal and another attempt must be made to disconnect it;

What I claim is:

1. The combination with a se't pipe, ofa seat within said ipe awash pipe within the set'pipe, a cage ike valve on the upper end of the wash pipe, said valve being provided with a port in thefside thereof, and a restricted wate r passagewa extendin lengthwise therethrough, an an externa .proection on said valve adapted to rest on sai seat. j j

2. In combination a wash pipe, a cage at tached to the upper 'end thereof, an external lateral projection carried by the cage,"

said cage having a port through the side thereof on one side of the projection, and a restricted port therethrough on the other side of the projection,` and a ring through which the wash pipe extends and on which 'said projection is adapted to seat.

3. In combination with a wash pipe hav- `r ing its u per end threaded, a ycage screwed onto sai v'threaded end of said wash pipe, a laterayl'port in saidcage, an annular .shouldercarried by said cage and a ring upon which saidl shoulderis adapted to seat.

4. In a ydevice of the character` described,

-tlie combination with a set CIpipe of a seat between two `sections of sai pipe, a wash pipe within said set pipe, a cage-like valve on the upper end of said wash'l pipe, said cage being provided with a port in the side thereof, an a restricted water passageway extending lengthwise therethrough, andv a shoulder on the said cage adapted to seat on said seat.

5. In combination, ,a wash pipe, a cup llike valve attached to one end thereof, said by said valve, said valve having a lateral port beneath the shoulder.

y 8. Ina device ofthe character described,v

a wash pipe, lopen at its lower end and. whose upper end has an outward projection, and a lateral opening beneath said projection.

`In testimony'whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ALEXANDER THOMSON.

Witnesses:

I W. H. DUNLAY,

WM. A. CATHEY. 

